68997039619821 has 16 divisors (see below), whose sum is σ = 93552160790400. Its totient is φ = 45220746237120.

The previous prime is 68997039619747. The next prime is 68997039619829. The reversal of 68997039619821 is 12891693079986.

68997039619821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 68997039619821 - 2¹³ = 68997039611629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68997039619829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 96368065 + ... + 97081398.

It is an arithmetic number, because the mean of its divisors is an integer number (5847010049400).

Almost surely, 2^{68997039619821} is an apocalyptic number.

68997039619821 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

68997039619821 is a deficient number, since it is larger than the sum of its proper divisors (24555121170579).

68997039619821 is a wasteful number, since it uses less digits than its factorization.

68997039619821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193451476.

The product of its (nonzero) digits is 634894848, while the sum is 78.

The spelling of 68997039619821 in words is "sixty-eight trillion, nine hundred ninety-seven billion, thirty-nine million, six hundred nineteen thousand, eight hundred twenty-one".